* ActorAllusion: Jack tells the story of when he and Whit, then voiced by Hal Smith visited Bath, North Carolina, where they met [[TheAndyGriffithShow Uncle Randy and his Deputy Arny.]]
** In "The Malted Milkball Falcon", after an all night rocking chair competition, Emily Jones says "The [[VideoGame/MetalGearSolid4 sunrise...]] It's so [[http://www.youtube.com/watch?v=lO8jcem2qC4#t=06m14s pretty...]]"
* AdoredByTheNetwork: While the AnimatedAdaptation is syndicated to many stations, [=FamilyNet=] seems to keep it on their Saturday morning roster. When there is only one toon on the line-up, odds are it's usually this.
** [=FamilyNet=] dropped the show in the 2011-2012 season and replaced it (in the 'sole animated show' placement) with ''Monsters and Pirates''.
*** And yet they still air the ChristmasEpisode the Saturday before Christmas!
* TheCastShowoff: Some recent Odyssey episodes feature Eugene Meltsner playing the ukelele (based on voice actor Will Ryan's skill at playing the instrument). Also, [[WesternAnimation/{{TheLandBeforeTime}} Aria Curzon]], voice of Mandy Straussberg showed off her singing talents on a few episodes.
* {{Defictionalization}}: There is a real Whit's End at the Focus on the Family headquarters.
* HeyItsThatVoice: Mandy is [[WesternAnimation/{{Recess}} Cornchip Girl]]
** Aubrey is [[WesternAnimation/KaBlam Loopy]]
** Jason Whittaker is [[WesternAnimation/TheTick The Tick]]
** Is that Jack Allen or [[WesternAnimation/DuckTales Scrooge McDuck]] or [[Series/MisterEd Wilbur]] maybe even [[WesternAnimation/TheSmurfs Farmer Smurf]]?
** Whit's first voice was that of [[TheAndyGriffithShow Mayberry's town drunk Otis]]
** Wooton Bassett is voiced by [[WesternAnimation/{{Animaniacs}} Wakko Warner]]
** Don't forget Chris -- she voices the Barbie doll!
** Monica sounds like [[BaldursGate Imoen]] in a perpetual bad mood.
** Earl Boen actually sounds a lot scarier as [[EvilTwin Regis Blackgaard]] than he ever did as a certain [[VideoGame/MonkeyIsland undead pirate]].
*** [[AlwaysIdenticalTwins And]] [[UncannyFamilyResemblance hilarious]] [[ActingForTwo as]] Edwin Blackgaard
** Connie is [[WesternAnimation/TotallySpies voiced by]] [[TheMrMenShow Katie]] [[WesternAnimation/DarkwingDuck Leigh]]
** One of the voices of Marvin Washington: [[ThatsSoRaven Cory]] [[CoryInTheHouse Baxter]].
** Trent [=DeWhite=] is [[ComicStrip/{{Peanuts}} one of the voices of Linus]] and [[WesternAnimation/Ben10AlienForce Cooper]].
** Liz Horton is [[ComicStrip/{{Peanuts}} one of Lucy's voices]] and [[StillStanding Becca]].
** Ed Washington is Big Mike from ''Series/{{Chuck}}''.
** Janet Waldo voiced Lawrence Hodges' schoolteacher mother and later Jack Allen's wife Joanne.
** If Whit sounds a little like Owl from ''[[Disney/TheManyAdventuresOfWinnieThePooh Winnie the Pooh]]'', it's because both Hal Smith and Andre Stojka have played both roles.
** And if Eugene sounds a little like Rabbit from ''Winnie the Pooh''... or is that [[TheLandBeforeTime Petrie]]?
** Emily Jones talking about how pretty the [[VideoGame/MetalGearSolid4 sunrise]] is was deja vu inducing.
** New resident bully Vance King combines this with TheOtherDarrin. King's voice in his debut was provided by [[Series/HannahMontana Jason]] [[Series/KickinIt Earles]]; where all other appearances have had his voice provided by Creator/JasonMarsden.
** David Parker is [[Series/ParksAndRecreation Trevor Nelsson]].
* MissingEpisode: A few early shows starring a bumbling police officer (named Officer Harley) were pulled and re-recorded when parents complained that he gave children the wrong impression of authority figures. Officer Harley's only appearance now is at the end of the episode where the Barclays get robbed and the {{Flashback}} about how Whit acquired Whit's End.
* OldShame: Katie Leigh (voice actress for Connie) played a major character from the ''Dungeons & Dragons'' [[WesternAnimation/DungeonsAndDragons animated series]], a fact which got a bit awkward after AIO did an episode condemning the role-playing game, "Castles and Cauldrons". Of course, considering how much fantasy voice-acting there is to do, most of the cast probably view that episode as OldShame themselves. In any case, when the D&D came out on DVD in 2006, Leigh was the only member of the cast to reprise her role as Sheila for (appropriately enough) the radio play of "[[TheResolutionWillNotBeTelevised Requiem]]". In earlier interviews she said she'd be quite happy to do the role again.
** Even before the animated series ended production, it was pretty clear that the writers were somewhat embarrassed by it and its noticeable difference in tone and writing. "A Day In The Life" was a partly a satirization of the changes in the animated series, wherein a Hollywood studio comes to make a movie about Odyssey and keeps making ridiculously over-the-top changes to make the movie more interesting until [[InNameOnly you can barely tell the movie's about Odyssey at all]]. "[[AprilFoolsDay I Slap Floor]]" even contained a DiscontinuityNod where ([[ItMakesSenseInContext a slightly unhinged]]) Whit draws up plans for the Strata-Flier (Whit's standard mode of transportation in the animated series) and raves about the adventures they can take in it and the people they can save. Everyone else in the room thinks Whit's being ridiculous.
--> '''Connie''': "Uh...huh."
--> '''Tom Riley''': "Maybe you should lie down, Whit."
--> '''Whit''': "Well, you'll be sorry the next time someone falls off a clock tower!"[[note]] This was something that actually happened in the animated series to Dylan.[[/note]]
** Within the radio show itself, we have the episodes that featured the klutzy police officer David Harley, who was quickly dropped when parents complained that he was giving kids a bad idea about police officers, and the episodes either went [[MissingEpisode missing]] or were either rewritten or rerecorded without Harley in them. In one case the early episode "Lights Out At Whit's End" was pulled, not just because of Harley, but because the episode was just [[BizarroEpisode too weird]], featuring little in the way of aesops (aside from a vague "it's good to spend time with your friends" moral) and ending with a random [[DancePartyEnding free-style rapping session]] that even Tom Riley and Whit take part in! The episode isn't even included in the "[[LostEpisode Lost Episodes]]" album.
* TheOtherDarrin: Whit's voice actor was replaced after his original one died. And then ''again'' after he died too.
** When Katrina's [[PutOnABus bus came in]], her actress had changed as well. She's even quieter now.
** Walker Edminston passed away before he could finish recording Bart's lines in the episode "Suspicious Finds" (wherein Bart was a major character). Bart's lines were rerecorded with another actor.
** Marvin Washington went through three different voices during his run on the show.
** All three of the Parker children have had their voices replaced once.
** Averted narrowly with Eugene; the writers initially thought about having Steve Bridges stand in for Will Ryan to record the message on Whit's answering machine at the end of "Exit", but decided against it and simply spliced together clips from old episodes (in similar fashion to the messages Whit left on the Whit's End answering machine during the Blackgaard arc or an earlier Novacom episode for which neither Will Ryan nor Pamela Hayden could record Eugene or Katrina).
* RecycledScript: After the episodes starring the bumbling police officer Harley were pulled (parents objected because they gave children the wrong impression of authority figures), the episodes were rewritten to feature a bumbling private investigator instead.
* RomanceOnTheSet: During the early years, the character of Lucy Cunningham-Schultz was voiced by Genni Mullen, while the role of Jack Davis was played by Donald Long. Around the time their characters were phased out, Mullen and Davis ended up marrying, and when their characters appeared again in a 2008 episode shortly before the most recent {{ReTool}}, Lucy and Jack got engaged.
* TalkingToHimself:
** Walker Edminston as Tom Riley and Bart Rathbone.
** Earl Boen as Edwin Blackgaard and Dr. Regis Blackgaard (although they only ever interacted with each other in one episode).
** Steve Burns as Rodney Rathbone and Robert Mitchell.
* WhatCouldHaveBeen: A lot relating to the "Darkness Before Dawn" StoryArc, as detailed in the various [[AllThereInTheManual guide books]] released over the years. Among other things, the arc was meant to be the GrandFinale of the series, and would have featured some plot elements involving Dr. Regis Blackgaard possibly making a HeelFaceTurn, [[TheAtoner Richard Maxwell]] dying, and Whit's End ''[[{{HSQ}} burning to the ground]]''. When the writers realized that they had introduced other questions along with the ones they had intended to wrap up, however,[[note]] for example, how Katrina would react to Eugene's new-found faith or whether or not [[PutOnABus Whit]] would ever return to Odyssey[[/note]] they felt that they needed to address these, and the series continues to this day.
** In the Novacom saga, the writers wanted to bring back Richard Maxwell to be the man behind AREM (a phonetic spelling of the initials "R.M."), but Maxwell's voice actor Nathan Carlson was unavailable, so Robert Mitchell was created for the role instead.